Sewing-machine



O. HARMAN.

SEWING MACHINE.

3 Sheets-Sheet 1.

( No Model.)

Patented Deo. 23, 1890.

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(No Model.) 3 sheets-'sheet 2.

C. HARMAN. SEWING MACHINE.

No. 443,395. APatented Deo. 23, 1890.

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(No Mdel.) s sheets-sheet 3.

C HARMAN v SEWING MACHINE.

Patented Deo. 23, 1890.

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CLARENCE HARMAN, OF OMAHA, NEBRASKA.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent N o. 443,395, dated December 23, 1890.

Application filed February 18, 1890. Serial No. 340,840. (N o model.)

T0 all whom, 'llt may concor/L:

Be it known that I, CLARENCE HARMAN, of Omaha, in the county of Douglas and State of Nebraska, have invented a new and Improved Sewing-Machine, of which the following is a full, clear, and exact description.

My invention relates to improvements in sewing-machines; and the object of my invention is to make a simple, strong, durable, and inexpensive machine which will be fully as efficient in operation as the machines of a more complicated construction.

To this end my invention consists in certain features of construction and combinations of parts, which will be hereinafter fully described, and specifically pointed outI in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a vertical section of the entire machine. Fig. 2 is an inverted plan of the same. Fig. 3 is a vertical section on the line a; x, looking in the direction of the arrows. Fig. 4 is a broken detailed view of the feedshaft and crank. Fig. 5 is a detailed view of the feed-bar and feed-dog. Fig. 6 is a detailed view of the presser-foot. Fig. 7 is a vertical section, with the hand wheel removed, on the line a' a', looking in the direction of the arrows. Fig. 8 is a front elevation of the feed-regulator attachment. Fig. 9 is a detailed view of one of the forks of the shuttie-lever, with the block and crank connection therewith. Fig. 10 is a vertica-l section on the liney y, looking in the direction ofthe arrows. Fig. ll is a section on the line w w, showing the groove in the feed-rocker. Fig. 12 is a vertical section of the connection between the feed-lifter shaft and the shuttlelever. Fig. 13 is a detailed view of the shuttlc-carrier, Fig. 14 is a perspective view showing the connection of the shuttle-carrying lever and means for adjusting the feed with the main shaft.

The bed-plate A, arm B, and the needle and tension operating mechanism of the machine are of the usual construction and will need no detailed description, as they form no part of my invention.

My invention consists, chiefly, in the shuttle-carrying mechanism, the stop-motion, thel feed mechanism, and the regulator for the same. The main shaft O of the machine is provided with a crank O, which operates the shuttle-lever D. The shuttle-lever D is formed from a single piece having a vertical portion, which terminates in a bifurcated upper end D', a horizontal portion, which extends beneath the bed-plate and to the end of which the shut-tle-carrier E is attached, with a thickened portion D2 at the point where it is pivoted to the bed-plate, and with a forwardlyextending arm D3, which is pivoted to theinner portion of the arm B. The shuttle-lever is pivoted to the bed-plate A and arm B of the machine by means of suitable pins or screws a, which should be in vertical line with each other, so that the lever D may oscillate freely thereon. By providing the lever D with said forwardly-extending arm I utilize space in the hollow machine-arm B which is not otherwise available, and leave the space in rear of the vertical portion of the lever free for operation of another part, hereinafter referred to.

Between the arms of the fork D of the shuttle-lever are two blocks F, having recesses F therein, which fit upon the ball O2 of the crank O', and from the recesses F eX- tend tapering recesses F2, through which the crank O extends. rlhe blocks are arranged upon each side of the crank and have smooth backs, which press against the inner faces of the fork D" of the shuttle-lever and may move thereon, so that as the crank revolves it will move the blocks F and cause the shuttle-lever to oscillate upon the pivots a and impart an oscillating motion to the shuttle-carrying end of the lcver. A screw Z) passes through the lower portion of the fork D', by means of which it may be adjusted upon the blocks F.

Attached to the terminal end of the horizontal portion of the shuttle-lever is a shuttie-carrier E, which is open at the top, so that the shuttle H may be easily inserted therein, is provided with a spring E', which lies iatwise in the carrier and presses against the shuttle, and which is turned up at one end and removably attached to the end of the Vshuttle-carrier with suitable ends, which approximate to the shape of the shuttle, so as to hold it firmly in place, with a face-wall E3,

IOO

against which the shuttle bears, and with a shank E2, by which it is connected with thi` shuttle-lever.

Attached to the shaft tf near the eran k is an eccentric J, which is inclosed by an eccentric-strap J', having a depending arm or rod J2, which extends downwardly inside the arm 1l, and is attached to one end of the feedrocker l( by a suitable screw. The feedrocker 'li is pivoted to the stud il, which is suitably attached to the arm ll by a screw c, so that as the shaft C, revolves, causing the eccentric-strap J' and arm or rod J'2 to move vertically, the rocker l( will be tilted upon I5 its pivotc.

rlhe feed-rocker li is provided with a lonf, which is pivoted by means of a screw j" to the upper end of the connecting-rod L. The

2o lower end of the rod L is pivoted to theerank M of the feed-shaft )l by the screw g, and the upper portion of the rod is provided with a longitudinal slot L', in which moves a pin of the feed-regulating mechanism, as hcreiu after described.

The .feedshaft M is mounted in suitable bearings upon the underside of the bedplate A, and near the front edge thereof is provided with the laterally-extemling crank M', which 3o connects with the main shaft C by the train of mechanism already described and which os- ,i cillates the feed-shaft, and at the other end with a vertical crank M2, which is pivoted to one end of the feed-bar N, and by means of which the feed-bar is reciprocated.

The feed-bar N is provided with a feed-dog N', which projects through a slot in the plate A in the usual manner, and which is suitably attached to the feed-bar, the upper surface of 4o the feed-dog being roughened in the usual i manner that it may engage any cloth or other material with which it comes in contact and forceit through beneath the needle. One end of the feed-bar Nis supported upon the crank M2, as shown, and the other end is forked, as shown, and the forked end is supported by a roller 71, which is pivoted to the laterally-extending crank P of the feed-lift shaft l", which is supported in suitable bearings upon 5o the other side of the machine. The feed-lift shaft l is also provided with a depending vertical crank l, which is attached to the same near the opposite end from the crank l, said crank l)2 terminating in a ball l, which is inelosed by a sockety' of the connectingrod j, thus making a balljoint connection.

The rod j extends across to the shuttle-lever l), and is pivoted tothe under side thereof by a screw l, so that the motion of the shuttle- 6o lever will be communicated to the shaft l, causing said shaft to oscillate, thus raising and lowering the crank l and the feed-bar N,

to the forked end of which it is connected.

rlhe outer end of the main shaft C is bored out, as shown, and a rod nl.. inserted in the recess thus formed. The inner end of the rod 'm is provided with a pin nl', which projects through suitable slots n in the shaft t and tits within a recess Qin thcloose pulley Q. The other end of the rod m projects beyond the end of theshaft C, is screw-threaded, as shown, and is provided with a hand-nut lt, which fits the thread thereof. The pulley Qis mounted loosely upon the shaft and between the pulle,v and tlte nut R is the usual hand-wheel S, which is fixed to the sha-ft by means of a Set-screw p. The pulley Q, to which the driving-belt is attached, willtherefore turn upon the shaft without running the machine; but by turning the handlint R the pulley (.2 will be forced against the hand-wheel S by means ofthe rod `m` and pin ni', and as the handwheel is fixed to the shaft the shaft will be gitudiual groove li', in which moves the roller i turned and the machine operated.

ihe length of the feedthatis,thedistance the dog N travels at cach stroke-is regulated by the position of the rollerj'in the groove K of the rocker K as motion is communicated from said rocker by means of the rolletf, connecting-rod L, shaft M, feed-bar N, and their connections to said dog. For instance, if the rollerfwere in the center of the rocker l, there would be no motion transmitted to the rod L, and as thc roller is forced toward the ends of the rocker theiength of the stroke will be increased. It will be observed also that: if the roller is at one side of the center and is changed to the other side the stroke will be reversed and the machine will feed in the opposite direction.

'io afford means of changing or reversing the stroke of the feed, a curved `bar 'l' is pivoted at its elbow to a bracket T beneath the plate A, one end of the bar extending upwardly to a point opposite the slot L of the rod L, with which it connects by a pin t, and the other end extending up through a slot Tf of the curved plate T on the upper side of bed-plate A and having a thumb-nut Ir attached thereto, by means of which it may be fixed in any desired position on the plate. By loosening the thumb-nut r and tilting the bar T the rod L and roller f will be moved and the length of the feed-stroke changed or reversed. 'lhe thumb-nut may then be tightened, thus making the stroke permanent. It will thus be seen that the stroke may be instantly changed, and that by means of the regulating mechanism the machine will feed. in either direction, as desired.

In order that the machine may feed etpially well in either direction, I provide a pecu liarly-formed presserfoot il, having a flat bearing-surface and having the front and rear portion. u. slanted upwardly, as shown.

rl`he m achine operates as follows: When the pulley Q is forced against the hand-wheel S, motion will be communicated to the shaft C, and as the shaft revolves the crank C there of will actua-te the blocks F and move the bifurcated end of the shuttlelever I), causing said lever to oscillate upon the pins a and imparting a reciprocating or slightly-oscillat ing motion to the slutttle-carrier E and shutn IOU IIO

tle H, which Works in relation to the needle in the usual manner. As the shaft C revolves, it will also oscillate the eccentric-strap J by means of the eccentric J, thus imparting a vertically-reciprocating motion to the rod J 2 and oscillating the feed-rocker K, to which it is attached. The feed-rocker will in turn move the rod L by means of the roller f and pin f. The rod L will move the crank M and oscillate the feed shaft M, which by means of the vertical crank M2 will give the necessary reciprocating motion to the feed-bar N and dog N. As the horizontal portion of the shuttle-lever D is connected to the rod j, it will reciprocate said rod, which will tilt the crank P2 and oscillate the shaft P. The shaft P will in turn oscillate the crank P', thus giving a vertical movement to the feed-bar N and dog N by means of the roller h, which fits in the bifurcated end of the feed-bar. It is necessary that the feed-bar should have. this movement, otherwise the dog N would move the cloth back and forth without feeding it in either direction. By attaching the parts as described they will be so 'timed that the feed-bar will be given a stroke at each revolution of the main shaftand stroke of the needle.

In ordinary machines the shuttle is moved back and forth in a raceway, thus causing a great amount of friction and wear, which will be entirely obviated by the use of my shuttlecarrier.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a sewingmachine, the right-angled shuttle-carrying lever D, having the forked vertical extension D', and the forwardly-extended arm Dain combination with the crankshaft O, the needle-bar, the hollow arm B, and bed-plate A of the machine, said lever being pivoted to the arm and bed-plate at polnts between itself and the needle-bar, as shown and described.

, 2. The combination, with the shaft C, having a transverse slot and a longitudinal bore that traverses the latter, of the hand-wheel S and pulley Q, mounted side by side and respectivelyfixed and adapted to slide on the shaft, the rod m, fitted in the aforesaid bore and having a cross-pin m', which Works in contact with a smooth surface on the inner end of the pulley, and the hand-nut R, applied to the outer threaded end of the rod, as shown and described, whereby upon turning the hand-nut the pin m forces the contiguous flat surfaces of the pulley and hand-wheel into contact, as specified.

3. In a sewing-machine, the grooved oscillating rocker K, pivoted to the head of the machine, in combination with the rod J2, pivoted to one end of said rocker, the slotted connecting-rod L, having roller f, working 1n the rocker, the pivoted bar T, for shifting said rod to vary the throw, the cranked main shaft and its eccentric, the vertically-oscilla*- ing shuttle-carrying lever, and the shuttle and other directly co-operating stitch-forming mechanism, the shafts M and I), cranks M M2, and reciprocating bar N, all as shown and described. c

CLARENCE HARMAN. litri esses:

HILO J. CoweiLL, W. J. RoUrLEDGn. 

